Im with psyral. First I wanna say I think they just wing this shit as they go along, but that being said, its was always fun to me to figure out what each card meant to me and not just what I read about it in the cd jacket.

 I took the tempest as metaphor just like I did the first deck. We see roller coasters as a series of high points and low points just as we do life. The Tempest is the storm of YOUR life, the dark carnival equivalant of St. Peter showing you a projection of your life before the riddlebox decides where you go.

Of course they never really truly made concept cds out of the cards. The concept doesnt usually go any further than the intro and cd jacket so everyone could see it different than I do.